What is ingestion?

What is ingestion?

• A. Breathing in a substance
• B. Injecting into tissue
• C. Taking a substance into the stomach, usually through eating or drinking
• D. Absorbing through skin

Answer: (C)

Ingestion is taking a substance into the body through the mouth, usually by eating or drinking. This means the material is swallowed and enters the gastrointestinal tract, where it may be exposed to stomach acids and digestive enzymes, and can be absorbed into the bloodstream from the intestines. Ingested substances often undergo first-pass metabolism in the liver before reaching systemic circulation. This route is distinct from inhalation (breathing a substance into the lungs) and dermal absorption (through the skin), as well as injection (delivering a substance directly into tissue). So taking something into the stomach through eating or drinking correctly defines ingestion.

Ingestion is taking a substance into the body through the mouth, usually by eating or drinking. This means the material is swallowed and enters the gastrointestinal tract, where it may be exposed to stomach acids and digestive enzymes, and can be absorbed into the bloodstream from the intestines. Ingested substances often undergo first-pass metabolism in the liver before reaching systemic circulation. This route is distinct from inhalation (breathing a substance into the lungs) and dermal absorption (through the skin), as well as injection (delivering a substance directly into tissue). So taking something into the stomach through eating or drinking correctly defines ingestion.